Uber told CNNMoney that there are roughly five to 10 locations in each city, including San Francisco's Harvey Milk Plaza and New York City's Stonewall Inn. Uber has created individual pages, like this one for Pittsburgh, for each of the 40 cities to notify people of the destinations.

This comes after Sunday's massacre at a gay nightclub in Orlando. 49 people were murdered in the deadliest mass shooting in U.S. history and the country's worst terror attack since 9/11.

In Orlando, Uber has already been giving unlimited free rides to the families of victims and survivors of the shooting. That's part of a coordinated effort with the State Emergency Response Team, which has also been working with JetBlue(JBLU) and Airbnb to provide free flights and housing.